ISSUEWorkflows are still running even though the list item was terminated
RESOLUTIONUse the NWAdmin.exe -o SyncTerminatedWorkflows -url siteurl -terminateDeletedItems
The parameter -terminateDeleteItems, will terminate the workflow if the item has been deleted.
More details about the NWAdmin command can be found here:
ADDITIONAL INFORMATIONIf that doesn't resolve the issue, use a webservice to terminate the workflow.
More details of these can be found here: